JP3079154B2 - Cylindrical anti-vibration mount and method of making the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical anti-vibration mount suitable for mounting an undercarriage member of an automobile and a method of manufacturing the same.

[0002]

2. Description of the Related Art A cylindrical anti-vibration mount in which an anti-vibration base made of a rubber layer is integrally interposed between an outer cylinder and an inner cylinder of a concentric arrangement is provided between an automobile frame and a suspension member. It is widely used as a shock absorber to reduce vibration transmitted to the vehicle body.

As shown in FIGS. 1 and 2, for example, a conventional mount of this type is arranged symmetrically on both sides of an inner cylinder (1), and a slit-shaped bulge ( 5)
Is formed.

In this mount, when a low load giving vibration in the direction of BB shown in FIG. 1 is applied, the bending portion (5) bends, so that the vibration isolating base (3) surrounds the inner cylinder (1). ) Exhibits soft bending characteristics and contributes to vibration prevention, while in the C-C direction shown in the figure, the mount exhibits rigid bending characteristics and can withstand high-load vibration. It has a structure with different directions.
In addition, in such a mount, as shown in FIG. 2, a rubber layer (8) having a ridge (7) is formed on the outer peripheral surface of the outer cylinder (2) in order to improve the attachment to the member side. Often
The rubber layer (8) serves as a substitute for painting, and the ridges (7) serve to prevent the mount from slipping out and improve sitting when the mount is inserted into the mounting hole of the member.

[0005]

On the other hand, when the above-mentioned anti-vibration mount is manufactured, the rubber constituting the anti-vibration base is vulcanized, so that residual strain due to shrinkage after vulcanization is reduced by the above-mentioned anti-vibration base. And left a problem with the durability of the rubber. This residual strain can be removed by compressing the outer cylinder in a radially inward direction with a die when the outer cylinder does not have a rubber layer on the outer peripheral surface. In a mount having a ridge, the ridge is crushed by a die, so that the residual strain due to the above-described compression cannot be removed, and the strain remains.

SUMMARY OF THE INVENTION The present invention addresses the above-described situation and eliminates the above-mentioned residual strain of a cylindrical vibration isolating mount having a rubber layer provided with a rubber ridge on the outer cylinder and pre-compresses the vibration isolating base. It is another object of the present invention to improve the durability of the mount.

[0007]

That is, the feature of the cylindrical anti-vibration mount of the present invention for achieving the above object is that
In cylindrical elastic mount having a rubber layer having a multi-stage ridges that Totsude radially without outer cylinder outer peripheral surface of the vibration-isolating base is crushing the projections, is compressed radially inwardly
In the configuration in which vibration-isolating base is formed by removing the distortion residual. Ma
In addition, the present invention provides a method of making the above-described vibration isolation mount,
The inner cylinder, the outer cylinder surrounding it, and the two cylinders
And a vibration-proof base made of a rubber elastic body, and provided outside the outer cylinder.
Multi-stage ridge made of rubber elastic body that protrudes radially on the peripheral surface
The anti-vibration mount having a rubber layer with
Recesses corresponding to the ridges on the outer surface of the outer cylinder and capable of accommodating each ridge individually
Using a die provided with a groove, the above-mentioned ridges are formed in the respective grooves.
The outer cylinder to its height without crushing the ridges
Compressed radially inward from the entire circumference and residual vibration-proof substrate
It is characterized by eliminating distortion.

[0008]

In the above-mentioned mount of the present invention, the entire outer peripheral surface of the outer cylinder of the mount is pressed and compressed radially inward from the entire circumference without narrowing the ridges on the outer peripheral of the outer cylinder, thereby narrowing the outer cylinder. This makes it possible to remove the residual strain of the mount anti-vibration base, and at the same time, to preliminarily compress the mount, thereby significantly improving the durability of the anti-vibration mount.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cylindrical anti-vibration mount according to an embodiment of the present invention.

FIG. 1 is a plan view of a cylindrical anti-vibration mount according to an embodiment, and FIG. 2 is a cross-sectional explanatory view taken along the line AA of FIG. 1, wherein (1) is an inner cylinder and (2) is an outer cylinder. , (3) is a rubber vibration isolating base vulcanized and bonded between these two tubes, (4) is an intermediate plate,
(5) shows a burring portion, and (6) shows a stopper rubber.

As shown in FIG. 2, a rubber layer (8) provided with a multi-stage ridge (7) made of a rubber elastic body wound around the outer surface of the outer cylinder (2) in a ring shape. ) Is vulcanized. The ridges (7) can be formed spirally outside the ring shape. The convex shape (7) made of the rubber elastic body improves the seating of the cylindrical mount when the cylindrical mount is inserted into a mounting hole (not shown) of the member or prevents the mount from coming off. It is effective in improving workability, and does not require painting since the rubber layer (8) covers the entire outer cylinder.

On the other hand, (9) shown in FIG. 2 is a die,
In this example, 16 pieces are radially arranged to press inward the entire outer peripheral surface of the mount outer cylinder (2).
The pressing surface of the die (9) is formed with a concave groove (10) corresponding to each convex line (7) on the peripheral surface of the mount outer cylinder and capable of accommodating each convex line.

Thus, the anti-vibration mount of the present invention uses the above-mentioned die (9) as an example, and accommodates each convex groove (7) of the outer cylinder (2) in each groove (10) of the die (9). Then, the outer cylinder (2) is produced by compressing the outer cylinder (2) in a radially inward direction from the entire circumference over its height without crushing the ridge (7). (3) is pressed to remove the residual strain, and at the same time, is pre-compressed, so that the durability of the anti-vibration mount is remarkably improved. It is also possible to use a wire or the like instead of the die (9), wind it around the outer cylinder (2) so as to avoid the ridge (7), and compress the outer cylinder.

In the above-mentioned compression process, the rubber layer (8) existing between the ridges (7) is directly subjected to a compressive force by the pressing surface of the die (9). ) Is as thin as about 0.5 mm and is not crushed by the compressive force.

[0015]

As described above, the cylindrical anti-vibration mount according to the present invention includes the inner cylinder, the outer cylinder, and the rubber-elastic vibration-proof substrate fixed between these two cylinders. vibration damping mount having a rubber layer having a multi-stage ridges that Totsude the outer peripheral surface in the radial direction of the tube, the compression in the radial inward direction without the outer cylinder outer peripheral surface of the vibration-isolating base is crushing the ridge Is
Are those Te formed by removing the distortion residual vibration insulating substrate,
Since the outer cylinder is squeezed without crushing the ridge with a die having a concave groove on the pressing surface, the residual strain is also removed in the mount having the rubber elastic ridge on the outer cylinder,
In addition, since the pre-compression can be performed at the same time, the both have a remarkable effect that the durability of the anti-vibration mount is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a cylindrical anti-vibration mount according to an embodiment of the present invention.

FIG. 2 is an explanatory sectional view taken along line AA of FIG. 1;

[Explanation of symbols]

 (1) Inner cylinder (2) Outer cylinder (3) Anti-vibration base (4) Intermediate plate (5) Girder (6) Stopper rubber (7) Convex ridge (8) Rubber layer (9) Dice (10) Groove

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyonobu Nariai 3rd Ikuyama, Utsugoe, Miyoshi-cho, Nishikamo-gun, Aichi Prefecture Toyo Tire & Rubber Co., Ltd. Automotive Parts Technology Center (56) JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16F 1/00-6/00 B60G 7/02

Claims (2)

(57) [Claims] An inner cylinder, an outer cylinder surrounding the inner cylinder, a rubber elastic body vibration-proof base fixed between the two cylinders, and a rubber projecting radially outwardly from an outer peripheral surface of the outer cylinder. Elastic?
Anti- vibration mount with rubber layer with multi-stage convex stripes
A is, the outer cylinder outer peripheral surface of the vibration-isolating base is crushing the ridge
It without cylindrical elastic mount according to claim Rukoto a vibration isolating base body is compressed in the radial inward direction is removed residual strain of. 2. An inner cylinder, an outer cylinder surrounding the inner cylinder,
A rubber elastic body vibration-proof base fixed between the cylinders, and
It is made of a rubber elastic body that protrudes radially on the outer peripheral surface of the outer cylinder.
Anti-vibration mount having a rubber layer with
The pressing surface corresponds to the ridge on the outer peripheral surface of the outer cylinder.
Using a die with recesses that can be accommodated,
Each of the ridges on the outer peripheral surface of the outer cylinder is accommodated to crush the ridges.
The outer cylinder is pressed radially inward from the entire circumference over its height.
It is specially designed to reduce the residual strain of the vibration-isolating substrate.
How to make a cylindrical anti-vibration mount.